Left-hand panel: radius of the correlation peak of the granulation seen in the continuum (pink curve), and in the wings of the FeI 630.15 nm (blue curve) and FeI 630.25 nm lines (red curve), as functions of the image position. For images in the southern hemisphere we use − sinθ as the coordinate, whereas in the northern hemisphere we use sinθ (θ is the heliocentric angle). Right-hand panel: same as the left-hand panel but for the correlation peaks of the polarization images.